Towards nationwide probabilistic mapping of slow-moving landslides in Turkey using InSAR

L. Lombardo*, Yu Wang, N. Sadhasivam, A. Dahal, C. van Westen, Ashutosh Tiwari, Susanna Werth, Manoochehr Shirzaei, H. Tanyas

*Corresponding author for this work

Research output: Contribution to conferenceAbstractAcademic

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Abstract

nterferometric Synthetic Aperture Radar (InSAR) is widely used for detecting slow-moving landslides due to its high spatial resolution and millimeter-level accuracy over large areas. However, the computational demands of processing SAR data have hindered the development of national-wide slow-moving landslide inventories for many mountainous regions worldwide. This study examines a probabilistic approach to identify hillslope deformation anomalies as proxies for slow-moving landslide locations. We generated surface deformation data for the southeastern region of Türkiye, leveraging the high coherence of Sentinel-1 SAR imagery in areas with sparse vegetation cover. On the basis of the InSAR-derived hillslope deformation spatiotemporal pattern, a modeling framework inspired by extreme value theory will be developed. This will feature a suite of topographic, seismic, anthropogenic, and climatic variables. The model aims at predicting surface deformation and calculating the exceedance probability above a threshold suitable for classifying slow-moving hillslopes. After training, the objective is to transfer the model to the entirety of Türkiye to identify hillslopes exhibiting significant surface deformation and locate potential slow-moving landslides. This protocol will lay the foundation for advancing landslide hazard assessments and guiding further risk investigations.
Original languageEnglish
DOIs
Publication statusPublished - 15 Mar 2025
EventEGU General Assembly 2025 - Vienna, Austria
Duration: 27 Apr 20252 May 2025
https://www.egu25.eu/

Conference

ConferenceEGU General Assembly 2025
Abbreviated titleEGU 2025
Country/TerritoryAustria
CityVienna
Period27/04/252/05/25
Internet address

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